Water-heater



P. C. SACHSE.

WATER HEATER.

APPLICATION man nov. 29. 1920.

Patented Sept; 27, 1921.

UNITED STATES PATENT cre ice.

PAUL C. SACHSE, OF ST. LOUIS, MISSOURI.

WATER-HEATER.

To all whom it may concern:

Be it known that 1, PAUL C. SAoHsn, a citizen of the United States, residing at St. Louis, State of Missouri, have invented certain new and useful Improvements in l/Vater-Heaters, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming a part hereof.

The present invention is directed to improvements in water heaters, and especially to heaters attached to hot water boilers for domestic purposes; and while in the present embodiment of my invention the improvement is applied to heaters employing gas as a fuel, it is to be understood that I am not to be restricted to this type of heater. The object sought by my invention is to provide means for retarding the flow of the combustionproducts from the burn-' ing fuel (gas) and radiating the heat absorbed therefrom against the heatlng surfaces of the circulating coils of the heater in such manner as to materially increase the efficiency of the heater and reduce the time in heating a given quantity of water as compared with a heater as ordinarily constructed. The advantages of the invention will be more fully apparent from the following detatiled description in connection with the accompanying drawings in which Figure 1 represents an elevation of a conventional range boiler and gas waterheater, showing my invention applied thereto; Fig. 2 is an enlarged cross-section through the hot water boiler on the line 2-2 of Fig. 1; Fig. 3 is a plan of the gas strainer and radiator attached to the gas heater; and Fig. 4 is a diametric crosssection on the line 4. "4: of Fig. 3.

Referring to the drawings, 1, represents a conventional range or hot water boiler, with the usual cold-water feed pipe 2 and hot water outlet pipe 3, a cold water circulating pipe 4 leading from the bottom of the boiler to the intake end of the heating coil 5 of a gas water-heater, the discharge pipe 6 from the coil being connected at the boiler to a T 7 to which the pipe 3 is likewise coupled. Coupled to the T on the inside of the boiler is a spiral hot water discharge pipe or goose-neck 8 set at a slight incline to the horizontal (Fig. 1), and dischar ing tangentially and downwardly into the boiler, so that as the hot water circulating upward from the coil 5 through the pipe 6 discharges Specification ofi'etters Patent. Patented S t 27 1921 Application filed November 29, 1920. Serial No. 427,254.

rounded with the usual casing 9,.the same being openat the bottom, and provided with a removable top or cover 10 through which the pipe 6 passes. Leading from the opening E in the cover 10 is the gas outlet or discharge pipe P which conducts away the gases and combustion products traversing the casing 9 and the outersurfac'es of the coil 5, said gases and products of combustion being supplied by the gas burners 11,

11, disposed under the coil 5 at the bottom of the casing, said burners forming the upper terminals of the'branches 12, 12, leading from a T 13, which in turn is coupled toaTlW-oonnected to the 'gassupply pipe 14:. The pipe 6 is made in sections, the two sections immediately above the cover 10 being connected by a coupling or union 15 which may be moved out of the way at any time to permit the cover to be slipped off the1 short section leading directly from the coi 5.

To utilize to the best advantage the heat of the gases from the burners 11, I make suitable provision for retarding their passage through the casing 9 so that they may remain in longer contact with the heating surfaces of the coil 5, the retarding member being providedvwith a heat absorber and radiator which radiates the heat against the coil, all of which operates to quickly heat the water circulating through the coil of the gas water-heater. This gas retarder is in the form of a strainer attachment S composed of (preferably) alternate layers of wire netting n and loose particles of asbestos a, the strainer in the present example being composed of a top and bottom sheet of wire netting, an inner or middle sheet of wire netting, and a layer of asbestos between each of said top and bottom wire sheets and inner wire sheet (Fig. 4.) The strainer is circular and is provided with a central opening 0 for slipping over the pipe 6 for insertion into the casing 9, it being under stood that the lid or cover 10 is first removed to allow the strainer S to be passed into the casing after which the cover is'restored to the casing, leaving thestrainer resting on top of the coil below the cover 10 and the opening E leading to the pipe P. Before the combustion products can escape through th'eopening E they must first pass through the strainer S. Since the strainer offers more or less resistance to the free passage of the gases, the latter will be in a measure retarded and hence remain in longer contact with the heating surfaces of the coil 5 than would be the case if the strainer were not present. At the same time the porous layers of absestos a will not only absorb the heat of the gases and become very hot, but the hot asbestos will radiate the heat rays against the coil, thereby increasing the efficiency of the heater to a very high degree. It has been found in practice that a column of water of a given height heated to a certain temperature within a given time without the use of the strainer S, can be heated in half the time when the strainer is present. In lieu of wire.netting I may substitute a wire cloth; and in lieu of asbestos I may substitute any other material of mineral origin which is non-combustible,

and a good heat absorber, and radiator.

Neither do I wish to be restricted to the number of layers of the reticulated wire fabric or the asbestos, nor to the thickness of the layers; but the mineral heat radiating material shall be sufficiently loose or porous so as not to unduly hold back the gases passing through the casing 9 toward the discharge opening E and the outlet pipe P. In the present example the strainer S is circular to conform tothe circular cross-section of the casing 9, but with a different shaped casing the strainer would obviously be changed to conform thereto. Features shown but not alluded to are well known in the art and a description thereof is here unnecessary. Where necessary, the pipes are provided with ordinary control valves V as shown.

Having described my invention what I claim is:

1. A heater attachment comprising top and bottom sheets of wire netting, and intermediate layers of asbestos in a loose state, permitting of a free passage of gases therethrough.

2. A strainer attachment for the gases of heating stoves, comprising alternate layers of reticulated material and loose mineral in sheet form, the mineral serving to reflect the heat, and to radiate the heat absorbed thereby.

In testimony whereof I affix my signature, in presence of two witnesses.

PAUL O. SAOHSE.

Witnesses:

EMIL STAREK. ELSE M. SIEGEL. 

